Add to that that the insulins used by a lot of people are over 20 years old and off patent. However, they are biologics and, as such, can't be simply made as a

Add to that that the insulins used by a lot of people are over 20 years old and off patent. However, they are biologics and, as such, can't be simply made as a generic. Any "generic" needs to go through testing and approval, which means the generics (like Basaglar is for Lantus) aren't that much cheaper (80% of the cost, I believe).